i am making a video game on alice called space invaders and i am having trouble trying to figure out how to make them die randomly and i am also having troble trying to make the enemy ships shoot and the players ship to shoot

i am making a video game on alice called space invaders and i am having trouble trying to figure out how to make them die randomly and i am also having troble trying to make the enemy ships shoot and the players ship to shoot

JUst have it pick random numbers between 1 and 10. Then make a function: When #variable=3(any number between 1 and 10) make guy die. Then assign a number between 1 and 10 to each object that you want to die.